bug#26084: 24.5; epatch save wrong backups in Git multipatches

[Tino Calancha <tino.calancha@gmail.com>]

Tino Calancha <tino.calancha@gmail.com> writes:

> emacs -Q /tmp
> ;; Eval following form:
> (let ((cmd "
> mkdir -p foo
> cd foo
> echo 'qux here' > qux.txt
> echo 'bar here' > bar.txt
> git init
> git add . && git commit -m 'Test repository.'
> echo 'foo here' > qux.txt
> echo 'foo here' > bar.txt
> git diff > ../foo.diff
> git reset --hard HEAD
> "))
>   (call-process-shell-command cmd))
>
> M-x epatch RET n /tmp/foo.diff RET /tmp/foo RET n RET q y RET q y q y
> ;; Eval this form:
> (string=
>  (with-temp-buffer
>    (insert-file-contents "/tmp/foo/bar.txt")
>    (buffer-string))
> (with-temp-buffer
>   (insert-file-contents
>    (concat "/tmp/foo/bar.txt" ediff-backup-extension))
>   (buffer-string)))
> => t ; Should be nil.
Pushed fix into master branch as commit:
abe731eef0fcbc59ef4836e06f6099ea17042b90